可调灵敏度的新型光纤光学甲烷检测系统  

Novel Fibre-optic Methane Detection System with Variable Sensitivity

作　　者：胡艳玲[1] 王智洪 吴希军[1] 

机构地区：[1]燕山大学测试计量技术及仪器河北省重点实验室,河北秦皇岛066004 [2]舞阳钢铁有限责任公司,河南舞钢462500

出　　处：《仪表技术与传感器》2012年第11期119-120,127,共3页Instrument Technique and Sensor

基　　金：国家自然科学基金资助项目(61071202;60974115);河北省自然科学基金资助项目(F2010001312)

摘　　要：应用取样光纤光栅和棱镜气室,构建了灵敏度可调的光纤甲烷检测系统,可实现对甲烷气体等距分布的多条吸收线的同时测量。利用背景扣除和比值处理技术,实现了常压下甲烷不同体积分数的检测。气体配置过程的在线实验表明,系统示值与体积分数变化间线性关系良好。A novel fibre-optic methane detection system with variable sensitivity was proposed, which involved sampled fibre grating and prism gas cell. By this method, near-infrared equal-spaced multi absorption line of methane were detected simultaneously. Detection of various concentration of methane was completed using subtraction of background and ratio processing method. The system was tested on-fine during gas mixing process and the linear relation between system indication and concentration variation was validated.

关 键 词：光纤光学 甲烷检测 取样光纤光栅 棱镜气室 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]